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(No Model.)

T. V. ALLIS. BARBED FENCING.

No. 466,744. Patented Jan. 5, 1892.

Fig-1- UNITED STATES PATENT OFFICE.

THOMAS V. ALLIS, OF NE\V YORK, N. Y.

BARBED FENCING.

SPECIFICATION forming part of Letters Patent No. 466,744, dated January5, 1892. Application filed March 2'7, 1889. Renewed April 24, 1891.Serial No. 390,241. (No model.)

To all whom it may concern:

Be itknown that I, THOMAS V. ALLIs, a citizen of the United States,residing at New York city, in the county and State of New York, haveinvented certain new and useful Improvements in Barbed Fencing; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention is an improvement of the kind of barbed fencing in whichbarbs are produced in the edges of a plain flat strip by notching theedges and slitting the metal lengthwise a short distance from thenotches and bending the spurs thus partly separated from the mainportion of the striplaterally to the sides; and it consists of thehereinafter described improvements in such fencing, reference being madeto the accompanying drawings, in which- Figure 1 is a side elevation ofa short section of my improved fencing, a part of which is leftincomplete to show the condition prior to the bending of the barbs. Fig.2 is an edge view of the same with all the barbs bent, and also beingcorrugated sidewise, as in the complete condition. Fig. 3 is atransverse section. Fig. 4 is an edge view showing the barbs bent indifferent order.

My improved-fencing consists of the plain flat strip a, of the usualthickness for such fencing, but preferably a little wider than in someother forms, with laterally-projecting barbs b on each edge alternatelyor in alternate and oppositely-directed couples, the said barbs beingproduced out of the marginal portions of the respective edges, notchedto the depth for the required width of the barbs by the obtuse V-shapednotches c, and slitted along the lines (1 from the bottoms of thenotches each way the required length of the barbs or a little more, andthe parts thus partly separated from the strips bent laterally thereto,as shown.

The length of the marginal spaces e from which the barbs are produced isthe same as the combined length of the two 'barbs produced therefrom,and the distance from space to space of both edges is about the same orslightly less, so that all the barbs are about equal distances apart.This is the most desirable order therefor, both for style of appearanceto the eye and for general utility, and it utilizes all the edgeportions of the strip available for barbs consistent with the properreservation of material for strength, for it is found necessary toreserve the whole width of the strip, as in the parts f, fora cer t-aindistance between the spaces e, to counteract the tendency of the metalto crack at the ends of the slits d, and preserve equal strength thereatto the strength of the parts 9 along the slits, although the latterparts aremuch narrower'than the parts f, but more length of the saidparts f than is thus required is a waste of a portion of the stripavailable for barbs.

The wider parts f counteract the tendency to cracking from the ends ofslits d by virtue of the transverse rigidity which opposes theobliquely-resultant tearing stresses of the tension of the strips inuse.

The angular notches c produoe'the angular points of the barbs in theplane of the bottom of the spaces e, in which planes they are moreeffective than if in the planes of the edges of the strip, because inthe latter condition the strip twists more under the influence ofpressure on the points than in the former condition, and thus have lessresisting power.

I also corrugate the strip sidewise, as seen in Fig. 2, for elasticityand for better appearance, and I so gage the corrugation to the barbsthat the bends thereof for the lateral projection merge in the curves ofthe corrugations, so as to make them less abrupt and therefore moresymmetrical and stronger than they otherwise would be.

What I claim, and desire to secure by Let ters Patent, is-

l. The improved barbed fencing consisting of the plain flat strip havinglaterally-projecting barbs on each edge produced out of the marginalportions of the strip and being uniform distances apart, and havingtheir points in the planes of the bottom of the spaces in the edges ofthe strip, substantially as described.

2. The improved barbed fencing consisting of the plain flat strip havinglaterally-projecting barbs on each edge in alternate andoppositely-directed couples produced out of the marginal portions of thestrip and having oblique points produced in the plane of the bottom ofthe spaces in the edges of the strip out of which they are produced,substantially as described.

3. The improved barbed fencing consisting of the plain fiat strip havinglaterally-projecting barbs on each edge in alternate and 3oppositely-directed couples produced out of marginal portions of thestrip and being uniform distances apart, and said strip being corrugatedsidewise, substantially as described.

4C. The improved barbed fencing consisting In testimony whereof I atfiXmy signature in 20 presence of two witnesses. r

THOMAS V. ALLIS. Witnesses:

W. J. MORGAN, W. B. EARLL.

